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Finding the Fourth Proportional to 92,603.90, 138,907.89 and 64,112.78

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Solution

The fourth proportional to 92,603.90, 138,907.89 and 64,112.78 is: 96,170.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,603.90 : 138,907.89 = 64,112.78 : x
  2. Step 2: Convert to fraction form
    92,603.90/138,907.89 = 64,112.78/x
  3. Step 3: Cross multiply
    92,603.90x = 138,907.89 × 64,112.78
  4. Step 4: Simplify right side
    92,603.90x = 8,905,770,991.83
  5. Step 5: Solve for x
    x = 8,905,770,991.83/92,603.90
  6. Step 6: Final answer
    x = 96,170.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.